1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 5 */ 6 7 #ifndef __INODE_DOT_H__ 8 #define __INODE_DOT_H__ 9 10 #include <linux/fs.h> 11 #include <linux/buffer_head.h> 12 #include <linux/mm.h> 13 #include "util.h" 14 15 extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask); 16 extern int gfs2_internal_read(struct gfs2_inode *ip, 17 char *buf, loff_t *pos, unsigned size); 18 extern void gfs2_set_aops(struct inode *inode); 19 20 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip) 21 { 22 return !ip->i_height; 23 } 24 25 static inline int gfs2_is_jdata(const struct gfs2_inode *ip) 26 { 27 return ip->i_diskflags & GFS2_DIF_JDATA; 28 } 29 30 static inline bool gfs2_is_ordered(const struct gfs2_sbd *sdp) 31 { 32 return sdp->sd_args.ar_data == GFS2_DATA_ORDERED; 33 } 34 35 static inline bool gfs2_is_writeback(const struct gfs2_sbd *sdp) 36 { 37 return sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK; 38 } 39 40 static inline int gfs2_is_dir(const struct gfs2_inode *ip) 41 { 42 return S_ISDIR(ip->i_inode.i_mode); 43 } 44 45 static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks) 46 { 47 inode->i_blocks = blocks << 48 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); 49 } 50 51 static inline u64 gfs2_get_inode_blocks(const struct inode *inode) 52 { 53 return inode->i_blocks >> 54 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); 55 } 56 57 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change) 58 { 59 change <<= inode->i_blkbits - GFS2_BASIC_BLOCK_SHIFT; 60 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks >= -change)); 61 inode->i_blocks += change; 62 } 63 64 static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr, 65 u64 no_formal_ino) 66 { 67 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino; 68 } 69 70 static inline void gfs2_inum_out(const struct gfs2_inode *ip, 71 struct gfs2_dirent *dent) 72 { 73 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); 74 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr); 75 } 76 77 static inline int gfs2_check_internal_file_size(struct inode *inode, 78 u64 minsize, u64 maxsize) 79 { 80 u64 size = i_size_read(inode); 81 if (size < minsize || size > maxsize) 82 goto err; 83 if (size & (BIT(inode->i_blkbits) - 1)) 84 goto err; 85 return 0; 86 err: 87 gfs2_consist_inode(GFS2_I(inode)); 88 return -EIO; 89 } 90 91 extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 92 u64 no_addr, u64 no_formal_ino, 93 unsigned int blktype); 94 extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 95 u64 no_formal_ino, 96 unsigned int blktype); 97 98 extern int gfs2_inode_refresh(struct gfs2_inode *ip); 99 100 extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 101 int is_root); 102 extern int gfs2_permission(struct user_namespace *mnt_userns, 103 struct inode *inode, int mask); 104 extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); 105 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); 106 extern int gfs2_open_common(struct inode *inode, struct file *file); 107 extern loff_t gfs2_seek_data(struct file *file, loff_t offset); 108 extern loff_t gfs2_seek_hole(struct file *file, loff_t offset); 109 110 extern const struct file_operations gfs2_file_fops_nolock; 111 extern const struct file_operations gfs2_dir_fops_nolock; 112 113 extern int gfs2_fileattr_get(struct dentry *dentry, struct fileattr *fa); 114 extern int gfs2_fileattr_set(struct user_namespace *mnt_userns, 115 struct dentry *dentry, struct fileattr *fa); 116 extern void gfs2_set_inode_flags(struct inode *inode); 117 118 #ifdef CONFIG_GFS2_FS_LOCKING_DLM 119 extern const struct file_operations gfs2_file_fops; 120 extern const struct file_operations gfs2_dir_fops; 121 122 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) 123 { 124 return sdp->sd_args.ar_localflocks; 125 } 126 #else /* Single node only */ 127 #define gfs2_file_fops gfs2_file_fops_nolock 128 #define gfs2_dir_fops gfs2_dir_fops_nolock 129 130 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) 131 { 132 return 1; 133 } 134 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ 135 136 #endif /* __INODE_DOT_H__ */ 137 138